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https://github.com/xen-project/xen.git
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Andrew Cooper
5b42c82f55
Mixed throughout libxc are uint32_t, int, and domid_t for domid parameters. With a signed type, and an explicitly 16-bit type, it is exceedingly difficult to construct an INVALID_DOMID constant which works with all of them. (The main problem being that domid_t gets unconditionally zero extended when promoted to int for arithmatic.) Libxl uses uint32_t consistently everywhere, so alter libxc to match. Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Release-acked-by: Julien Grall <julien.grall@linaro.org> [ wei: fix compilation error in libxl ] Signed-off-by: Wei Liu <wei.liu2@citrix.com>
128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
/******************************************************************************
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*
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* tools/libxc/xc_mem_paging.c
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*
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* Interface to low-level memory paging functionality.
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*
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* Copyright (c) 2009 by Citrix Systems, Inc. (Patrick Colp)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "xc_private.h"
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static int xc_mem_paging_memop(xc_interface *xch, uint32_t domain_id,
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unsigned int op, uint64_t gfn, void *buffer)
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{
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xen_mem_paging_op_t mpo;
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memset(&mpo, 0, sizeof(mpo));
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mpo.op = op;
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mpo.domain = domain_id;
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mpo.gfn = gfn;
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mpo.buffer = (unsigned long) buffer;
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return do_memory_op(xch, XENMEM_paging_op, &mpo, sizeof(mpo));
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}
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int xc_mem_paging_enable(xc_interface *xch, uint32_t domain_id,
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uint32_t *port)
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{
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if ( !port )
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{
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errno = EINVAL;
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return -1;
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}
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return xc_vm_event_control(xch, domain_id,
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XEN_VM_EVENT_ENABLE,
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XEN_DOMCTL_VM_EVENT_OP_PAGING,
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port);
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}
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int xc_mem_paging_disable(xc_interface *xch, uint32_t domain_id)
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{
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return xc_vm_event_control(xch, domain_id,
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XEN_VM_EVENT_DISABLE,
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XEN_DOMCTL_VM_EVENT_OP_PAGING,
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NULL);
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}
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int xc_mem_paging_resume(xc_interface *xch, uint32_t domain_id)
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{
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return xc_vm_event_control(xch, domain_id,
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XEN_VM_EVENT_RESUME,
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XEN_DOMCTL_VM_EVENT_OP_PAGING,
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NULL);
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}
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int xc_mem_paging_nominate(xc_interface *xch, uint32_t domain_id, uint64_t gfn)
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{
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return xc_mem_paging_memop(xch, domain_id,
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XENMEM_paging_op_nominate,
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gfn, NULL);
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}
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int xc_mem_paging_evict(xc_interface *xch, uint32_t domain_id, uint64_t gfn)
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{
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return xc_mem_paging_memop(xch, domain_id,
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XENMEM_paging_op_evict,
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gfn, NULL);
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}
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int xc_mem_paging_prep(xc_interface *xch, uint32_t domain_id, uint64_t gfn)
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{
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return xc_mem_paging_memop(xch, domain_id,
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XENMEM_paging_op_prep,
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gfn, NULL);
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}
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int xc_mem_paging_load(xc_interface *xch, uint32_t domain_id,
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uint64_t gfn, void *buffer)
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{
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int rc, old_errno;
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errno = EINVAL;
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if ( !buffer )
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return -1;
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if ( ((unsigned long) buffer) & (XC_PAGE_SIZE - 1) )
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return -1;
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if ( mlock(buffer, XC_PAGE_SIZE) )
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return -1;
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rc = xc_mem_paging_memop(xch, domain_id,
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XENMEM_paging_op_prep,
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gfn, buffer);
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old_errno = errno;
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munlock(buffer, XC_PAGE_SIZE);
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errno = old_errno;
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return rc;
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}
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/*
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* Local variables:
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* mode: C
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* c-file-style: "BSD"
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* c-basic-offset: 4
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* indent-tabs-mode: nil
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* End:
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*/
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